watch dominoes, set of 90 components, 6 dominoes - learning the time

It is not easy to understand the clock. Many children get into trouble in learning the watch. With the six different watch dominoes the children learn easily the handling of the watches and the functional understanding. With each domino the level of difficulty increases.
Example of use: ideal to work alone or in a group in the free work
Control for success: when the domino is set correctly it would end with the time of the start domino
The article consists of 6 dominoes including each 15 single dominoes, made of plastic, approx. 7,5 x 3,8 cm;
6 small plastic boxes 1 keeping safe box, wood, with lid